While we've watched as game systems have evolved exponentially over the years, not much monumental has happened to controllers since the invention of the joystick — that is, until the Steam Controller ($TBA). After announcing plans to build an operating system and console based on their popular PC-based gaming platform Steam, the guys at Valve set out to build an input device that would bring the control of a keyboard and mouse into the living room. Based around two circular trackpads that replace the familiar joysticks, it features advanced haptic feedback and a built-in touchscreen that let you play games formerly reserved only for desktop machines.